Today's Fed-heads are old enough to remember the 1970s, when failure to get inflation under control produced a decade-long monetary crisis that was only resolved with (not exaggerating here) interest rates approaching 20%.

On the other hand, the yield curve – the difference between long-term and short-term interest rates – is trending towards zero and will, if it keeps falling, invert, meaning that short rates will exceed long. When this has happened in the past a recession has ensued.

With a system this highly leveraged it's completely possible that the next recession will threaten the whole fiat currency/globalization/fractional reserve banking world. No one at the Fed wants to preside over that, leading some to view rising inflation as the lesser of two evils. See Atlanta Fed Chief Pledges to Oppose Hike Inverting Yield Curve.

A lot of people seem to be aware of the Fed's dilemma. Here's an excerpt from a recent Reuters article on the subject:

Unemployment near a 20-year low screams at the U.S. Federal Reserve to raise interest rates or risk a too-hot economy. The bond market, not far from a state that typically precedes a recession, says not so fast.

The decision of which to heed looms large when the Fed's interest-rate setters meet next week. Which path they follow will begin to define whether Chairman Jerome Powell engineers a sustained, recession-free era of full employment, or spoils the party with interest rate increases that prove too much for the economy to swallow.

New Fed staff research and Powell's own remarks seem to put more weight on the risks of super-tight labor markets, which could mean a shift up in the Fed's rate outlook and a tougher tone in its rhetoric.

Goldman Sachs economists, for instance, contend the Fed's "optimal" rate path is "well above market pricing under a broad range of assumptions." They see four increases likely next year, while investors expect only one or two, a significant gap.

Sounds like the Fed is choosing door number one, focusing on inflation and tightening policy to counter it. That's what it has typically done since the 1970s.